How do you get two sims into a wholesome relationship?

catloverplayerI kind of chuckled when I had a 'wholesome' romantic relationship popup in my game last night for this couple. Not sure what combo of triggers set it off, but the guy was their butler, plus I 'full-edit-mode' tweaked him a bit, so firing him or using him as a roommate was buggy for me (he kept switching back-and-forth to butler), so I finally had them ask him to join the household to fix it. Then I literally moved him into the bedroom of my target Sim to pair with him. However, they have only been on one date to get to know each other more, and I did it in the home. They have not kissed, and I don't have my Sims woo-hoo until they're married. Also, he's a 'high maintenance' Sim, and somewhat formal. I'm trying to have them 'court' in a modern way. So, I was not sure what all triggered that tag for the game, but it fit their relationship very well. I did choose all 5 types of romantic styles for both of them (gifts, etc.). Attaching screenshot of their details, in case it's of any use for this trigger/tag/question: